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3 years ago

The coefficient is a number that placed

Chemistry

1 answer:

rjkz [21]3 years ago

8 0

Answer:

in front of the elements

Explanation:

The coefficient tells you how much of each element there is in a molecule.

Hope that helps.

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What is the name of the scientist who first proposed that atoms have a nucleus

Archy [21]

<span>__Ernest Rutherford__</span>

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3 years ago

What is the ratio of the concentration of sodium acetate to the concentration of acetic acid at ph 5.75?

GREYUIT [131]

To get the ratio of the concentration of sodium acetate to the concentration of acetic acid we are going to use H-H equation:

when:

PH = Pka + ㏒[salt/acid]

when the Ka of acetic acid = 1.75 x 10^-5

so, we can get Pka from this formula:

Pka = -㏒Ka

= -㏒1.75 x 10^-5

= 4.76

and when we have PH = 5.75, so by substitution:

∴ 5.75 = 4.76 + ㏒[acetate/ acetic acid]

∴ [acetate/acetic acid] = 9.77

∴ the ratio of a concentration of acetate to acetic acid 9.77

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3 years ago

4. What are the products (things made) in photosynthesis?

SVETLANKA909090 [29]

Oxygen and glucose that’s all I know

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2 years ago

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Dinitrogen pentoxide is used in the preparation of explosives. If 7.93 mol of

Tpy6a [65]

The volume of O₂ produced: 84.6 L

<h3>Further explanation</h3>

Given

7.93 mol of dinitrogen pentoxide

T = 48 + 273 = 321 K

P = 125 kPa = 1,23365 atm

Required

Volume of O₂

Solution

Decomposition reaction of dinitrogen pentoxide

2N₂O₅(g)→4NO₂(g)+O₂ (g)

From the equation, mol ratio N₂O₅ : O₂ = 2 : 1, so mol O₂ :

= 0.5 x mol N₂O₅

= 0.5 x 7.93

= 3.965 moles

The volume of O₂ :

$\tt V=\dfrac{nRT}{P}\\\\V=\dfrac{3.965\times 0.082\times 321}{1.23365}\\\\V=84.6~L$

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4 years ago

Please help due today

KiRa [710]

Answer:

neodymium-145

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3 years ago